The most expensive apartment closing in New York City this year and one of the priciest sales ever is finally a done deal,reportsThe Real Deal. The apartment, the top penthouse at Rafael Viñoly-designed billionaire’s bunker432 Park Avenue, is the priciest unit in the big-ticket building as well as being literally the city’s highest. As 6sqftpreviouslyreported, the buyer is Saudi retail magnate Fawaz Al Hokair. The sale price was $87.7 million —a skyscraping $10,623 per square foot.